EnergyPlus · July 2026

Cheapest pay as you go energy tariff UK (July 2026)

Pay-as-you-go (PAYG) or prepayment energy customers in the UK have had a better deal since April 2024, when Ofgem aligned the prepayment cap just below the default tariff cap. In July 2026 that protection continues — but a 13% price-cap rise took effect on 1 July 2026, so this is the month to check your top-up rate and compare. This page explains what you'll pay, what changes in July, who runs the cheapest PAYG tariffs and how to switch.

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Editorial information, not financial advice. Prices and policy can change — always confirm against the supplier and Ofgem.

Cheapest PAYG energy tariffs — July 2026 snapshot

Through July 2026 prepayment customers pay the April–July 2026 prepayment cap unit rates and standing charges, which sit just below the default tariff cap on like-for-like usage. From 1 July 2026 those rates rise in step with the 13% default-cap rose (to £1,862/yr typical dual-fuel). The cheapest PAYG products remain smart-PAYG variants from British Gas, EDF, OVO, Octopus and ScottishPower, which give app-based top-ups and emergency credit. Switching PAYG supplier is straightforward and a smart meter unlocks better tariffs.

Quick checklist (July 2026):

  • The prepayment cap sits just below the default tariff cap and rises 13% from 1 July 2026.
  • Smart-PAYG tariffs are the cheapest PAYG products in 2026.
  • You can switch PAYG supplier in 5 working days under Faster Switching.
  • Emergency credit and friendly hours protections continue under Ofgem rules.
Last updated
July 2026
Reviewed by
Energy Specialist
Audience
UK households & small businesses

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Cheapest UK pay as you go energy tariffs (July 2026)

A clear, current overview to help you choose with confidence.

How the prepayment cap works

Since April 2024 the prepayment cap has been set just below the default tariff cap to reflect that PAYG customers pay up-front. Each quarter Ofgem publishes new rates for unit rate and standing charge that PAYG suppliers must not exceed — the next set takes effect 1 July 2026.

What the July 2026 rise means for PAYG

From 1 July 2026 the default cap rose about 13% to £1,862/yr (typical dual-fuel), driven mostly by a ~24% jump in gas; electricity rises only ~5%. The prepayment cap moves in step, so expect a similar increase to your top-up rates unless you're on a fixed deal.

Smart PAYG vs legacy PAYG

Smart-PAYG (SMETS2 in prepayment mode) lets you top up via app, see real-time balance and use emergency credit instantly. Legacy key/card meters still work but mean physical top-up locations and slower fault recovery.

Switching with debt

If your debt to your current supplier is £500 or less per fuel, the Debt Assignment Protocol lets you switch supplier and carry the debt across. Above that, your new supplier may decline — talk to your current supplier first.

When PAYG isn't the cheapest option

If you can budget a fixed monthly direct debit and pass a credit check, a credit-meter fix is usually cheaper — the cheapest dual-fuel fixes are around £1,536/yr, roughly £326 below the July cap. PAYG is the right answer if you can't afford the variability or have inherited a prepay meter.

Compare like-for-like

Indicative July 2026 product comparison for PAYG households. Use the form on this page for personalised quotes by postcode.

What to compare Typical position (July 2026) Notes
Default tariff cap (to 30 Jun 2026) £1,641/yr typical dual-fuel Maximum on standard variable credit-meter tariffs until 1 July.
Default tariff cap (from 1 Jul 2026) £1,862/yr typical dual-fuel (+13%) Confirmed by Ofgem on 27 May 2026; gas up ~24%, electricity up ~5%.
Prepayment cap Just below default cap Maximum on PAYG; rises in step from 1 July.
Smart PAYG (British Gas, OVO, EDF, Octopus, ScottishPower) At prepay cap or slightly under Best PAYG experience; needs SMETS2 in prepay mode.
Direct-debit credit meter fix From ~£1,536/yr (~£326 below July cap) Cheaper than PAYG if you can budget DD and pass a credit check; ~40% of homes are already on fixes.

How to switch to a cheaper UK PAYG energy tariff (July 2026)

  1. 1. Check your current top-up rate

    Look at your meter, in-home display or app for current unit rate and standing charge — and note that prepay rates rise from 1 July 2026.

  2. 2. Decide PAYG or direct debit

    If you can budget a fixed monthly payment, a direct-debit fix (from ~£1,536/yr) is usually cheaper. If PAYG is the right fit, continue.

  3. 3. Ask about a smart upgrade

    Your supplier installs SMETS2 in prepayment mode free of charge. This unlocks the best PAYG tariffs.

  4. 4. Get whole-of-market PAYG quotes

    Use the form on this page to surface PAYG options across suppliers for your postcode and meter.

  5. 5. Check debt position

    Owing up to £500 per fuel can be transferred under the Debt Assignment Protocol. Above that, talk to your current supplier first.

  6. 6. Apply and submit a meter read

    Switch completes in 5 working days. Submit an opening read on day one to keep billing accurate.

Common pitfalls to avoid

The most frequent issues we see when households and businesses act on what looks like a good deal.

  • Topping up only what you can afford this week — self-disconnection is a real risk, and rates step up from 1 July 2026.
  • Not registering with the Priority Services Register if you're eligible — it's free and adds protections.
  • Assuming PAYG is always cheapest — a credit-meter direct-debit fix usually beats PAYG on annual cost.
  • Ignoring smart-PAYG upgrades — the experience and tariff range is genuinely better than legacy key/card.

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Frequently asked questions

What is the prepayment cap in July 2026?

Through June the April–July 2026 prepayment cap applies, set by Ofgem and refreshed quarterly. It sits just below the default tariff cap on like-for-like usage — a deliberate adjustment Ofgem made in April 2024 to remove the historical 'prepay premium'. From 1 July 2026 it rises in step with the 13% default-cap increase.

How much does the cap rise on 1 July 2026?

Ofgem confirmed on 27 May 2026 that the default tariff cap rose to £1,862/yr for a typical dual-fuel direct-debit home from 1 July 2026 — up about 13% (£221) on the £1,641 April–June cap. Gas bills rise ~24% and electricity ~5%. The prepayment cap moves in step.

Can I switch PAYG supplier in July 2026?

Yes. Switching PAYG supplier takes 5 working days under the Faster Switching guarantee. If you owe up to £500 per fuel to your current supplier, the Debt Assignment Protocol lets you carry the debt to the new supplier.

Is smart PAYG cheaper than a key meter?

Pricing is set by the same prepayment cap, but smart-PAYG tariffs often sit a fraction below cap and unlock app-based top-ups, real-time balance and instant emergency credit. The experience is significantly better.

Which suppliers offer the best PAYG tariffs in 2026?

Octopus, British Gas, EDF, OVO and ScottishPower all offer smart-PAYG with strong app experiences in 2026. The cheapest in your postcode depends on regional cap rates — use the form to compare.

What's the difference between PAYG and Direct Debit?

PAYG charges you for energy as you top up, with the prepayment cap as a ceiling. Direct debit lets you pay a fixed monthly amount on a credit meter, and unlocks fixed tariffs — the cheapest dual-fuel fixes are around £1,536/yr, about £326 below the July cap. Direct debit is usually cheaper if you can budget for it.

Can I get a smart meter on PAYG?

Yes — your current supplier installs SMETS2 smart meters in prepayment mode for free. Once installed, you can usually pick a smart-PAYG tariff with app top-ups and emergency credit.

What's emergency credit on a prepay meter?

Most suppliers offer £5–£10 of emergency credit when your balance runs out, which is repaid from your next top-up. Friendly-hours protection means you won't be cut off at night or on Sundays/bank holidays.

Should I switch to direct debit before July?

If you can budget a fixed monthly payment and pass a soft credit check, switching from PAYG to a credit-meter direct-debit fix now can lock in a lower rate — the cheapest fixes sit around £326 below the July cap. Your supplier can arrange the meter mode change.

Trust, methodology and sources

Page governance

Reviewed by
Energy Specialist
Last updated
July 2026

How we keep this page current

We refresh this page each month against the latest Ofgem cap, supplier tariff changes and current scheme guidance. Worked numbers are illustrative; quotes you receive via the comparison form are personalised to your meter and postcode.

Editorial independence: our priority is clarity and like-for-like comparison. Where commercial relationships exist, options are still presented on suitability and the information available at the time.

Reputable UK sources we reference

If you spot anything that looks out of date (a rule change, a new scheme), please contact EnergyPlus so we can review and update this page.

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Updated on 13 Jul 2026